Which Routing Table is Used in MPLS Transit Router?
Question
In a Junos device functioning as an MPLS transit router, which routing table is used when performing a forwarding lookup for an incoming packet?
Answers
Explanations
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A. B. C. D.C
In a Junos device functioning as an MPLS transit router, the routing table used for forwarding lookup for an incoming packet is the "mpls.0" table.
MPLS (Multiprotocol Label Switching) is a technology used to route packets through a network based on labels instead of traditional routing protocols. When a packet arrives at a Junos device functioning as an MPLS transit router, the router adds a label to the packet and forwards it based on the label.
The "mpls.0" table is a special routing table used by Junos to store MPLS labels and their corresponding next-hop information. It is used by the router to perform forwarding lookups for incoming MPLS packets.
The "mpls.3" table, on the other hand, is used for VPN (Virtual Private Network) routing information, and the "inet.0" and "inet.3" tables are used for IPv4 and IPv6 unicast routing information, respectively.
Therefore, the correct answer is D. "mpls.0".
